Whacker Plates

All forms of block paving, brick paving, flexible or rigid, concrete or clays, new construction or renovation
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Alan Collinge
Posts: 17
Joined: Thu Jul 15, 2004 5:27 pm
Location: Kearsley Lancs

Post: # 4960Post Alan Collinge

My local hire centre told me that I should use a rubber foot for final positioning of pavors but one of my neighbours who has laid several driveways said that I should screed the pavors with sand and use a steel foot for final positioning.

What method do the experts use?

steve r
Site Admin
Posts: 143
Joined: Tue Jan 28, 2003 9:18 pm
Location: chelmsford

Post: # 4963Post steve r

You don't really need a rubber boot for the campactor plate, you will however need a pair of ear defenders!

84-1093879891

Post: # 4985Post 84-1093879891

Normally, we'd only use a rubber/neoprene sole plate on a vibrating compactor when consolidating clay pavers or certain types of exposed aggregate pavers. For everyday concrete blocks we'd not bother, and we'd never use one with tumbled pavers.

As for the preparation, again, no sole attachement is used when consolidating sub-base or bedding materials.

This is not the first time I've heard of Hire Centres "recommending" that DIYers use the rubber/neoprene sole (at an additional cost, naturally!) and I suspect that it's partly an attempt to improve turnover, but also to reduce the incidence of complaints from hirers who ahev gone a little bit OTT with the plate compactor and rattled the living daylights out of their pavers to the point where they've actually damaged the surface of the blocks.

When consolidating, the block reach a 'point of refusal', which is the point beyond which they simply will not consoilidate further. Once this point has been reached, there's no 'give' left in the laying course material, so the blocks have to absorb all of the impact from the plate compactor, and it's this that often damages the blocks. Repeatedly running the plate up and down, side-to-side, for hours on end does NO GOOD WHATSOEVER to either a sub-base or the block pavers. You're just wasting your time, your fuel, and seriously pissing-off the neighbours.

Using a partial pre-compaction method of laying, no more than 6 passes of the vibrating plate are likely to be needed by any block pavement. Up, down, left, right, diagonal L-R, diagonal R-L and that's it!

So: don't worry about the rubber/neoprene attachment. The odds are that you don't need it!

Alan Collinge
Posts: 17
Joined: Thu Jul 15, 2004 5:27 pm
Location: Kearsley Lancs

Post: # 4991Post Alan Collinge

Thanks Steve and Tony, this has answered my question and given me an explanation too.

Look out neighbours!

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